chore: Always use newest golangci lint, fix linting issues

.github/workflows/golangci-lint.yml

@@ -23,5 +23,3 @@ jobs:
           fetch-depth: '0'
       - name: golangci-lint
         uses: golangci/golangci-lint-action@v6
-        with:
-          version: v1.55

.golangci.yml

@@ -3,23 +3,11 @@ run:
   concurrency: 4
   timeout: 5m
   tests: true
-  # vendor$, third_party$, testdata$, examples$, Godeps$, builtin$
-  skip-dirs-use-default: true
   modules-download-mode: readonly
   allow-parallel-runners: false
-  go: '1.19'
 
 # output configuration options
 output:
-  # Format: colored-line-number|line-number|json|tab|checkstyle|code-climate|junit-xml|github-actions
-  #
-  # Multiple can be specified by separating them by comma, output can be provided
-  # for each of them by separating format name and path by colon symbol.
-  # Output path can be either `stdout`, `stderr` or path to the file to write to.
-  # Example: "checkstyle:report.json,colored-line-number"
-  #
-  # Default: colored-line-number
-  format: colored-line-number
   print-issued-lines: true
   print-linter-name: true
   uniq-by-line: true
@@ -44,9 +32,9 @@ linters:
     - gocognit
     - goconst
     - gocritic
-    - goerr113
+    - err113
     - gofmt
-    - gomnd
+    - mnd
     - gomoddirectives
     - gosec
     - gosimple
@@ -94,7 +82,7 @@ issues:
         - wrapcheck
 
 linters-settings:
-  gomnd:
+  mnd:
     ignored-functions:
       - context.WithTimeout
   nolintlint:

factory_test.go

@@ -60,26 +60,31 @@ func TestHTTPFrontendFactory_BuildBackend(t *testing.T) {
 
 	t.Run("memory", func(t *testing.T) {
 		t.Parallel()
+
 		testConfig := httpcache.BackendConfig{
 			BackendType: "memory",
 			Memory:      &httpcache.MemoryBackendConfig{Size: 10},
 		}
+
 		backend, err := factory.BuildBackend(testConfig, "test")
 		assert.NoError(t, err)
 		assert.IsType(t, &httpcache.MemoryBackend{}, backend)
 	})
 
 	t.Run("inmemory error", func(t *testing.T) {
 		t.Parallel()
+
 		testConfig := httpcache.BackendConfig{
 			BackendType: "memory",
 		}
+
 		_, err := factory.BuildBackend(testConfig, "test")
 		assert.Error(t, err)
 	})
 
 	t.Run("redis", func(t *testing.T) {
 		t.Parallel()
+
 		testConfig := httpcache.BackendConfig{
 			BackendType: "redis",
 			Redis: &httpcache.RedisBackendConfig{
@@ -88,6 +93,7 @@ func TestHTTPFrontendFactory_BuildBackend(t *testing.T) {
 				Port:               "8080",
 			},
 		}
+
 		backend, err := factory.BuildBackend(testConfig, "test")
 		assert.NoError(t, err)
 		assert.IsType(t, &httpcache.RedisBackend{}, backend)

frontend.go

@@ -12,6 +12,7 @@ import (
 )
 
 var ErrInvalidEntry = errors.New("cache returned invalid entry type")
+var ErrNoCacheBackend = errors.New("no backend defined")
 
 type (
 	// Frontend caches and delivers HTTP responses
@@ -40,7 +41,7 @@ func (f *Frontend) SetBackend(b Backend) *Frontend {
 
 func (f *Frontend) Purge(ctx context.Context, key string) error {
 	if f.backend == nil {
-		return errors.New("no backend defined")
+		return ErrNoCacheBackend
 	}
 
 	_, span := trace.StartSpan(ctx, "flamingo/httpcache/purge")
@@ -60,7 +61,7 @@ func (f *Frontend) Purge(ctx context.Context, key string) error {
 // The result of loader will be returned and cached
 func (f *Frontend) Get(ctx context.Context, key string, loader HTTPLoader) (Entry, error) {
 	if f.backend == nil {
-		return Entry{}, errors.New("no backend defined")
+		return Entry{}, ErrNoCacheBackend
 	}
 
 	ctx, span := trace.StartSpan(ctx, "flamingo/httpcache/get")
@@ -98,7 +99,7 @@ func (f *Frontend) Get(ctx context.Context, key string, loader HTTPLoader) (Entr
 	return f.load(ctx, key, loader)
 }
 
-func (f *Frontend) load(ctx context.Context, key string, loader HTTPLoader) (Entry, error) {
+func (f *Frontend) load(ctx context.Context, key string, loader HTTPLoader) (Entry, error) { //nolint:contextcheck // this is fine
 	oldSpan := trace.FromContext(ctx)
 	newContext := trace.NewContext(context.Background(), oldSpan)
 

frontend_test.go

@@ -118,6 +118,7 @@ func TestFrontend_Get(t *testing.T) {
 		test := test
 		t.Run(test.name, func(t *testing.T) {
 			t.Parallel()
+
 			wait := make(chan struct{}, 1)
 			loaderCalled := false
 			loader := func(ctx context.Context) (httpcache.Entry, error) {
@@ -127,9 +128,11 @@ func TestFrontend_Get(t *testing.T) {
 			}
 
 			backend := new(mocks.Backend)
+
 			if test.cacheGetter != nil {
 				backend.EXPECT().Get(testKey).Return(test.cacheGetter())
 			}
+
 			if test.wantSet != nil {
 				backend.EXPECT().Set(testKey, *test.wantSet).Run(func(key string, entry httpcache.Entry) {
 					wait <- struct{}{}
@@ -150,8 +153,10 @@ func TestFrontend_Get(t *testing.T) {
 
 			if (err != nil) != test.wantErr {
 				t.Errorf("Get() error = %v, wantErr %v", err, test.wantErr)
+
 				return
 			}
+
 			assert.Equal(t, test.want, got)
 		})
 	}

twoLevelBackend.go

@@ -95,7 +95,7 @@ func (mb *TwoLevelBackend) Set(key string, entry Entry) error {
 		mb.logger.WithField("category", "TwoLevelBackend").Error(fmt.Sprintf("Failed to set key %v with error %v", key, err))
 	}
 
-	if errorCount >= 2 { //nolint:gomnd // there are two backends no need to introduce const for that
+	if errorCount >= 2 { //nolint:mnd // there are two backends no need to introduce const for that
 		return ErrAllBackendsFailed
 	}